Circulating heater



June 25, 1946. P. BLAIR CIRCULATING HEATER Filed Dec. 30, 1942 2 Sheets-Sheet l Inventor June 25, 1946. A R 2,402,595

CIRCULATING HEATER Filed Dec. 50, 1942 2 Sheets-Sheet 2 Patented June 25, 1946 UNITED STATES PATENT OFFICE CIRCULATIN G HEATER Peter Blair, Tacoma, Wash.

Application December 30, 1942, Serial No. 470,620

The present invention relates to new and useful improvements in space heaters particularly for domestic use and has for its primary object to provide, in a manner as hereinafter set forth, a unitary device of this character comprising a novel construction and arrangement for thoroughly heating and circulating the air.

Other objects of the invention are to provide a circulating heater of the character described which will be comparatively simple in construction, strong, durable, highly eflicient and reliable in use, compact, attractive in appearance and which may be manufactured at low cost.

All of the foregoing and still further objects and advantages of the invention will become apparent from a study of the following specification, taken in connection with the accompanying drawings wherein like characters of reference designate corresponding parts throu hout the several views, and wherein:

Figure 1 is a view in side elevation of a heater constructed in accordance with the present invention.

Figure 2 is a view in front elevation thereof.

Figure 3 is a top plan view.

Figure 4 is a vertical sectional view, taken substantially on the line 4-4 of Figure 3.

Figure 5 is a cross sectional view, taken substantially'on the line 5-5 of Figure 1.

Figure 6 is a view in horizontal section, taken substantially on the line 6--6 of Figure 1.

Referring now to the drawings in detail, it will be seen that the embodiment of the invention which has been illustrated comprises a casing I of suitable dimensions and material, said casing being substantially rectangular in plan. The casing I is provided with supporting legs 2.

The top 3 of the casing I is provided with an outlet 4 for connection with a flue 5. The top 3 of the casing I further includes a depressed portion constituting an integral pan 6 for the reception of water for humidifying the air.

The lower portion of the casing I is lined in a manner to provide a chamber I in which burners 8 are mounted, A conduit 9 connects the burners 8 to any suitable source of fuel. Also mounted in the burner chamber 1 is a water heating coil III, A hinged door II on the front of the casing I provides access to the burners 8.

Mounted longitudinally in the casing I are a plurality of horizontally extending vertically spaced staggered air flues I2 of substantially rec- 'tangular cross section. The side wall I3 of the casing I has formed therein air intake openings I4 which communicate with the fiues I2. The

1 Claim. (Cl. 126-410) other side wall I5 of the casing I has formed therein a plurality of outlet openings I6 which also communicate with the flues I2.

Mounted on the side wall I3 of the casing I is a vertical air conduit I8. Partitions I9 divide the conduit I8 into a plurality of air passages 28 which communicate with the flues I2 through the intake openings I4.

The lower portion of the conduit I8 is provided with a pair of intake openings 2I and 22 which are controlled by a single valve 23, A support 24 projects horizontally from the lower end of the conduit I8. A blower 25 on the support 24 is connected to the inlet 2I of the conduit I8.

Projecting from the side I-5 of the casing I are what may be considered discharge nozzles 26 which communicate with the air fiues I2 through the outlet openings I 6. Deflectors 21 are pivotally mounted in the nozzles 26 for controlling the flow of the heated, discharged air in a horizontal plane or at an incline to the horizontal. Links 28 connect the deflectors 21 for operation in unison. An operating rod 29 is connected to the uppermost deflector 21. The rod 29 passes slidably through a guide 30 which is provided therefor on the upper portion of the casing I. A looking device 3| on the guide 30 frictionally secures the rod 29 in adjusted position.

It is thought that the operation of the heater will be readily apparent from a consideration of the foregoing. Briefly, with the valve 22 in the full line position of Figure 4 of the drawings and with the blower 25 in operation, said blower forces air upwardly through the passages 20 in the conduit I8 into the lines I2 through the intake openings I4. Of course, this air is thoroughly heated as it passes through the fiues I2 by the burners 8. As illustrated to advantage in Figure 5 of the drawings, the construction and arrangement of the dues I2 is such that they constitute staggered baffles in the casing I above the burners 8. The heated air passes through the outlets l6 and is discharged from the nozzles 26. By swinging the pivoted baflies 21 upwardly or downwardly the discharged air may be causedto flow in any desired substantially horizontal plane. By swinging the valve 23 to the dotted line position of Figure 4 of the drawings, the inlet 2I is closed and air may be taken into the conduit I8 directly from the atmosphere through the inlet 22,

It is believed that the many advantages of a heater constructed in accordance with the present invention will be readily understood and although a preferred embodiment of the device is as illustrated and described, it is to be understood that a single vertically swinging valve hinged at a point between said inlets for selective positioning to close either inlet and simultaneously open the other, and a blower having its outlet connected to the side inlet of said conduit, the bottom inlet being directly open to the atmosphere.

PETER BLAIR. 

